Irrationality's cognition, thinking, talking or acting without inclusion of rationality. The term's used, usually pejoratively, to describe thinking and actions that're, or appear to be, less useful or illogical than other more rational alternatives. Irrational behaviors of individuals include taking offense or becoming angry about a situation that hasn't yet occurred, expressing emotions exaggeratedly (such as crying hysterically), maintaining unrealistic expectations, engaging in irresponsib… (More on Irrationality)